valve slippage leaking seals

[Surge]

I am experiencing this slow leak down with a single-acting single hydraulic cylinder track dumper from ScaleArt. If there’s even a small load in the dumper bed, it will slowly drop down when raised. BUT - the pump is not always running. It’s set to only run when raising or lowering the bed. I assume that’s why the dump bed is dropping slowly? If the pump were always running, it should not drop, correct?

[skeeter]

Originally Posted by Surge

I am experiencing this slow leak down with a single-acting single hydraulic cylinder track dumper from ScaleArt. If there’s even a small load in the dumper bed, it will slowly drop down when raised. BUT - the pump is not always running. It’s set to only run when raising or lowering the bed. I assume that’s why the dump bed is dropping slowly? If the pump were always running, it should not drop, correct?

Even my hydraulic wheeled loader experiences bleed down, a bit. It's SLOW, but it is normal. Heck, even the real life machines experience it to some degree.